Why does my deep sleep stay at 15% on a sleep tracker?

[Charles_G]

I’ve been tracking my deep sleep with an Oura ring for about six months, and no matter what I try—strict sleep hygiene, magnesium glycinate, even total darkness—my deep sleep percentage just won’t budge above that 15% mark. I’m starting to wonder if this is just my personal baseline or if there’s something physiological I’m missing.

[AriaGG]

I did the same routine for a while, obsessing over that 15 percent. The ring showed me about 14 to 16% deep sleep most nights, and nothing I changed moved the number. I did strict bedtimes, magnesium, even blackout curtains, and the total hours sometimes nudged the minutes a bit, but the percentage stayed stubbornly flat.

[KevinOT]

Maybe it's the measurement more than physiology. Oura relies on heart signals, and when you move a lot or share the bed, it can mislabel sleep stages. The absolute minutes felt a bit more telling on busy nights, but the percentage looked fixed.

[Brian.W]

Are you sure the problem is the deep sleep metric, or is it the feeling of rest you’re chasing? It could be that you’re waking up as you reach a certain circadian phase rather than a true deficit in deep sleep.

[Sophia85]

One concrete thing I tried was cooling the room a few degrees and moving workouts earlier. The mornings did feel calmer some days, but the percentage stayed around 15%. Not sure what to take from that.